Harmony Electrical Systems (H.E.S. Alarms) is a privately owned firm engaged in the installation and maintenance of domestic, industrial and commercial Intruder Alarm systems to the standards of PD6662:2010*, NSI Codes of Practice and DD2243:2204.

*PD662 is the implementation of the European Standard EN 5031-1:2004, which incorporates the current ACPO policy on police response to security systems.

The firm was formed in June 1982 by the proprietor Brian Lewis, and since then has been committed to quality. We are approved to the standards of 'BS EN ISO 9001:2008' and 'Quality Schedule SSQS 101 for the Installation and Maintenance of Electronic Security Systems including: Access Control, CCTV Systems and Intruder Alarms.